Company email (November 2012):
"None of our beers contain any animal ingredients. Our philosophy on beer is one that allows us to keep the beer as natural as possible, and utilize flavors found in the basic ingredients water, hops, barley, and yeast. Our beers are all unfiltered so we don’t have a need to use animal products like isinglass.
Our brewery in Burlington, Vermont is the only place where our products are manufactured."